<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Document</title>
  </head>
  <body>
    <script>
      function Person(firstName, lastName) {
        this.firstName = firstName;

        this.lastName = lastName;
        return;
      }
      var obj = {
        fn: function () {
          console.log(this);
        },
      };
      //   var lydia = new Person('Lydia', 'Hallie');

      var sarah;
      window.Person('Sarah', 'Smith');
      obj.fn();
      //   console.log(lydia);

      //   console.log(sarah);
    </script>
  </body>
</html>
